Motor for door-operating mechanism.



A. GOT'TSCHALK.

MOTOR FOR DOOR OPERATING MECHANISM.

APPLICATION FILED SEPT. 6. I916.

- Patented Aug. 27, 1918.

3 SHEETS-SHEET A. GOTTSCHALK. MOTOR FOR DOOROPERATING MECHANISM.

APPLICA'HON FILED SEPT.6. I916.

Patented Aug. 27, 1918.

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A. GOTTSCHALK. MOTOR FOR DOOR OPERATING MECHANISM.

APPLICATION FILED SEPT. 6.1916.

Patented Aug. 27, 1918.

3 SHEETS-SHEET 3i nap sa'rus PATENT Ema ALBERT GOTTSCHALK,'OF NEW YORK,N. Y., ASSIGNOR TO NATIONAL PNEUMATIC COM- PANY, OF NEW YORK, N. Y., ACORPORATION OF WEST VIRGINIA.

MOTOR FOR DOOR-OPERATING MECHANISM.

Specification of Letters Patent.

Patented Aug. 27, 1918.

Application filed September 6, 1916. Serial No. 118,724.

To all whom it may concern:

Be it known that I, ALBERT Go'r'rsoHALK, a citizen of the United States,residing at New York, in the county and State of New York, have made acertain new and useful Invention in Motors for Door-Operating Mechanism,of which the following is a specification. a

This .invention relates to door operating mechanism, and particularly toelectrically controlled pneumatic door operating motors.

The objectof the invention is to provide Y a. simple and eflicientelectrically controlled door operating mechanism wherein the fulloperation of the motor is secured with but momentar 1 manipulation ofthe control switch. I

A further object of the invention is to provide in connectionwith anelectrically controlled pneumatic motor, a circuit locking device whichis pneumatically controlled.

A further object of the invention is to provide a pneumatically operatedcircuit locking device which is placed in operation by the initialclosing of the circuit.

A further object ofthe invention is to provide an adjustable device foruse in closing the door, or operating the motor in one direction, whichrequires manual operation of the motor for a predetermined portion ofthe closing movement of the door, or of the movement of the motor,before controlling circuit is closed .to electrically complete theclosing movement of the door, or the movement of the motor.

- Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination,location and relative arrangement of parts, all as will be more fullyhereinafter set forth, as shown by the accompanying drawing, and finallypointed out in, the appended claims.

' Referring to the drawings Figure 1 is a view in side elevation, partlyin section, of an electrically controlled pneuinatic motor andpneumatically controlled circuit locking device embodying my invention.

Fig. 2 is a'top, plan view of the same partly in section taken on the'line 2-2, Fig. 1 andlooking in the direction of the ZIITOWS.

Fig. 3 is an end sectional view taken on the line 33, Fig. 1.

Fig. 4 is a sectional view of the end plate shown in section in Fig. 1.a

s Fig. 5 is a wiring diagram of the circuit control of the motor.

Fig. 6 is a horizontal sectional view of a modified structure ofpneumatic circuit control device embodying my invention.v

Fig. 7 is a sectional View taken on the line 77, Fig. 6, and looking inthe direction of the arrows. V

Fig. 8 is a sectional view of a well know type of magnet valve.

The same part is designated by the same reference numeral wherever itoccurs throughout the several views.

Reference numeral 6 designates generally a standard double piston rackand pinion pneumatically operated motor, well known in the art, and suchas is shown and describedin my Patent No. 1,065,324, issued to me on the17th day of June, 1913. In this structure, the gear casing is shown at8, the gear shaft at 9 and the door operating connection 10 attachedthereto.

In accordance with my present invention I provide the top of thecylinder casing 6 withsuitable fiat bases 10, two on each side of thegear casing 8 as shown. I also provide two conduits one on each side ofthe cylinder, and extending the length thereof, in any suitable way, forexample, by casting conduits l1 and 12 into the cylinder body as shown.It is understood, however, that Iam not to (be limited to this detail.

I provide two pneumatically operated circuit controllers, indicatedgenerally at 13, which are adapted to rest on the bases 10, and to besuitably secured thereto in air tight connection therewith, as shown.

The cylinders 6 are provided with suitable heads designated by referencenumeral 14 which form the operating fluid pressure inlet, and which aresecured to the cylinders by suitable bolts 19. The heads 14L are eachprovided with a passage 15 connected to suitable source of fluidpressure supply, as through passage 16 which is registered therewith.The passage 15 is in communication with the inlet of the usual form ofmagnet valve, the outlet of which magnet valve is in communication withthe passage 18 of the cylinder head 14 which leads through port 20 intothe cylinder 6 to operate the piston therein. Communicating with theinlet passage 18 within the cylinder head, is a passage 21 whichcommunicates with a passage 22 formed in the end base portion 10 of thecylinder 6, and which passage in turn communicates with passage 23formed in the body of the pneumatic circuit control device 13, to allowthe fluid pressure to enter chamber 2 1 therein.

In Fig. 8, I show a common form of magnet valve which may be employed inaccordance with my invention. These magnet valves are now standardequipment and well known in the art and as a specific constructionlofthe same involves no part of my present invention, I will merely brieflydescribe the same as comprising the case 90 inclosiiig the coil 91 whichare controlled by the contacts 92, and through the core of which extendsthe plunger 93 equipped with a valve head 94 laid normally on a seat 95by means of a spring 96. Fluid pressure is admitted to port 97 frompassage 15, and when the valve head 94: is unseated the fluid pressureflows through passage 98 into communication with the passage 18. Whenthe valve head 9st is seated due to de'energizin the magnet by openingthe circuit thereo and also due to the action of the spring 96, thepassage 98 is'ther'eby placed incommunication with the exhaust port 99as will be readily understood and the exhaust port 99 is incommunication (see Fig. 4) with the passage 38 port 37 and conduit 11 atone end. Conduit 12 is [likewise in communication with the exhaust portof the magnet valve at the opposite end of the motor.

' The pneun'iatic circuit control device 13 compr1ses,in my preferableform, a cyl1ndrical casting as shown with a chamber 2 1 at one end and arelatively large chamber 25 at the other end. I prefer to bore thesechambers the required size and to close the aperture caused thereby inthe end walls of the cylinder by suitable plugs 26. Difi'erentialpistons 27 28 operate in the respective chambers and are connected by acommon rod 29 on which is loosely mounted a conducting ring 30 insulatedfrom the rod 29 by suitable insulating bushing 31. The conducting ring30 is adapted to slide along the rod 29 against the compression actionof a spring'32 when pressure is admitted behind the smaller piston 27.It will be noted that the device 13 on the left hand side of the gearcasing 8 is positioned with the larger piston 28 adjacent the gearcasing 8. The device on the right hand side of gear casingS is identicalin structure, and operation, and is likewise positioned with its alarger pistonadjacent the gear casing. Circuit terminals 85, 36, of thecontrollcircuit of door operating inotor project into the cylinder 13,and the function of the conducting ring 30 is to complete the circuitbetween the terminals 35, 36, as will be more fully hereinafter setforth.

The conduit 12, hereinbefore referred tov communicates at one end withport 37 of the motor casting and through passage 38 to the exhaust ofthe magnet valve at the other end, the conduit 12 communicates throughpassage 41 to chamber 2st of the casing 13. A passage 39 alsoestablishes communication between conduit 12 and chamber 25 of the righthaiid casing 13, which, as above stated is nearest the gear casing 8.The conduit 11' is provided with identical passages butof reverseddirection. That is the right hand end of the conduit communicates withthe right end'of the right casing 13, and the conduit communicates withthe chamber 25 of the casing 13,,and with the magnet valve as aboveexplained. Each of the chambers 25 are also provided with a passage 5L0leading through the base 10 into the main motor chamber, as shown. Iprefer to control this passage by a ball check, in one embodiment of myinvention, as illustrated. Thus itwill be seen thatif the magnet valveat the left end of the motor is energized to admit pressure to the leftend of the cylinder 6, conduit 12 is closed at its right end and open tothe fluid pressure at its left end, while conduit 11 is open to exhaust.Should the magnet valve at the right end be energized, as will be laterdescribed, the conduit 12is thereby opened to exhaust, and the conduit11 closed and placed in communication with the sour ce of fluid pressurethrough the magnet valve.

From the foregoing it will be seen that whengfluid pressure is admittedinto the main cylinder to cause the main piston to travel to the right,fluid pressure also passes through passages 21, 22 into chamber 2-1-thereby causing the pistons 27, 28to move toward the right. This causesthe contact or conducting ring-"30 to close the circuit betweenterminals 35, 36, and to maintain such circuit closed as long as.pressure is admitted. At the same" time, cond'uitjor passage 12,'is incommunication with chamber 24 through port 41, and thus pressure isadmitted through port 39 to the chamber 25 of the device 13 on the righthand side of gear casing 8, thus maintaining the contact ring 30 of thatdevice, which is nor mally out of contact with its terminals 35, 36, outof contact therewith, and preventing it accidentally or otherwise, fromestablishing its circuit. As soon as the piston within the main casing 6passes and uncovers the port 40, it will be seen that the pressure willbe equalized on each side of device 13, that is, there will be apressure behind the piston 28 equal to the pressure behind the piston27. The piston 28 being larger in area,

however, the pistons are forced to the left, breaking the circuitbetween the terminals 35, 36, thereby breaking the circuit controllingthe magnet valve, and shutting off the supply of fluid pressure.

In Fig. I show a wiring arrangement illustrating the electrical controlof the motor wherein 5O designates the source of current 51 and 52designate generally the magnet valves which control the supply of fluidpressure to the left and right hand pistons, respectively, and 53, 54designate the push buttons or switch control of the respective magnetvalves.

The terminals 35, 36, are the terminals controlled by the conductingring 30 of the control device 13. Thus it will be seen that if the lefthand piston is operated, say to close the door, the push button or otherswitch 53 is momentarily closed,

thereby establishing a circuit through the magnet valve 51, which thenadmits fluid pressure through port into the operating chamber of themotor, and coincidently admits the fluid pressure into chamber 24 ofdevice 13, causing the pistons 27, 28 to move to the right, therebyclosing the circuit between terminals 35, 36, and maintaining saidcircuit closed until the door closing movement is completed. It will beseen that a momentary closing of the switch 53 is all that is necessaryto secure the operation of the device 13 which maintains the circuit ofthe magnet valve 51 closed and the magnet valve energized. The operationof the reversing magnet valve 52, and its device 13 it will be seen, isidentical with that of 51.

It is sometimes desirable to require manual operation to start theclosing movement of the door, other than the pressing of the reversingbutton, for a portion of its closing movement. I provide for this bymounting onthe shaft 9 a lug 60 having secured thereto a short arm 61.The lug 60 is positioned on the shaft 9 at any desired angle, forexample bythe set screws 62. Suitably secured to the cylinder 6 bybracket 63 is a button switch 64 directly in the path of travel of thearm 61. The arm 61 is pivoted to the lug 60, as at 65 and is providedwith a rounded edge 66 so that when the arm 61 travels clock wise, itwill yield or rock when passing the button 64, but on its return travelwill not yield or rock, and will thereby depress the button 6 1 andclose the switch indicated at 67 in Fig. 5. Thus it will be seen thatthe closing movement of the door may necessitate manual operation forany portion thereof, according to the position of the lug 60 on shaft 9,before the switch 67 becomes closed to energize the magnet valve 51, andconsequently to operate its associated clevice 13, and the conductor 30to maintain ing movement.

It is necessary, in the devices 13,to prevent the fluid pressuresupplied to chamber 25, behind the larger pistons 28, through ports 39,from passing into the cylinder 6 of the main motor through ports 40. Toprevent this, I employ a ball check, as shown best in Fig. 1.

In Figs. 6 and 7, I show a modified structure of device 13, wherein Imake the connecting rod 29 of insulating fiber, sunk in the pistons 27,28. The spring 32 is in, this instance insulated from the conductor 30,by a mica or other suitable insulating washer 31. In this arrangement Iavoid the use of a ball check by embodying a double piston arrangementas shown at 28, 28. A spring 70 housed in the nut 26 and piston 28normally tends to keepthe circuit 0 en be tween terminals 35 and 36. Itwill e seen that due to the double piston arrangement, no fluid pressureentering port 39 can pass to port 40 and thence to the cylinder of themain motor.

It will be further seen that if it is desired to reverse the motorduring itsoperating movement in one direction, that is, for example, ifthe motor is closing the door, and it is desiredto again open the doorbefore the closing movement thereof is completed, the circuitcontrolling the device 13 which is not closing the path of travel ofcurrent between terminals 35, 36, may be closed. By closing thiscircuit, fluid pressure'is admitted to open the switch device 13 whichup to trol contributes largely to the safety of the motor in operation.7

Hav ng now setforth the objects and nature of my lnvention, and havingshown and described various embodiments thereof,

what I claim as new and useful, and of my own invention, and desire tosecure by Letters Patent is, p

1. The combination with a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and from saidmotor, an electric device to control said valve, a normally open circuitfor controlling said electric device, of means for momentarily closingsaid circuit and fluid pressure means operated thereby for maintainingsaid circuit closed.

2. The combination with a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and from saidmotor, an electric device to control said valve, a normally open circuitfor for admitting'fluid pressure to said motor and to said devicesinniltaneously.

3. The combination with a fluid pressure operated motor,a valve forcontrolling the supply and exhaust of fluid pressure to and from sa dmotor, an electric device to control said valve, a normally open circuitfor controlling said electric device, of means for momentarily closingsaid circuit and fluid pressure means operated thereby for maintainingsaid circuit closed and means for breaking said circuit when said motorhas completed its operation; I

4. The combination with a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and from saidmotor, an electric device to control said valve, a normally open circuitfor controlling said electric device, of means for momentarily closingsaid circuit and means operated thereby for maintaining said circuitclosed and fluid pressure operated means for breaking said circuit whenthe motor has completed its operation.

5. The combination with a fluid pressure operated motor, of a magnetvalve to control the supply of fluid pressure to said motor, a

normally open circuit for controlling said magnet valve, a fluidpressure operated switch for controlling said circuit, and meanscontrolled by' the initial momentarily closing of said circuit foroperating said switch. I

6. The combination with a fluid pressure operated motor,of a magnetvalve to control the supply of fluid pressure to said motor, a normallyopen circuit for controlling said magnet valve, a fluid pressureoperated switch for controlling said circuit, and means controlled bythe initial momentarily closing of said circuit for operating saidswitch, and means controlled by the completion of the operation of saidmotor, for opening said switch. i

7. In a door operating device,-the combination with a fluid pressureoperated motor, a valve for controlling; the supply and exhaust of fluidpressure toand from said motor, of an electric circuit for controllingthe operation of said valve, and'means operated by the manual movementof said motor for closing said circuit.

8. In" a door operating device, the combination with a fluid pressureoperated motor, a. valve for controlling the supply and exhaust'of fluidpressure to and from said motor, 'ofan electric circuit for controllingtheoperati'on of said valve, and means operated by the manual movementofsaid motor for closing said circuit and fluid pressureactuated means formaintaining said circuit closed until the end of the'movemei'it of saidmotor.

9. In a' door operating device, the combination with a fluid pressureoperated motor, a valve for controlling the supply and exhaust of fluidpressure to and from said motor, of an electric circuit for controllingthe operation of said valve, and means operated by the manuaY movementof said motor for closing said circuit and fluid pressure actuated meansfor maintaining said circuit closed until the end of the i'novement ofsaid motor, and means for breaking said circuit when said motor hascompleted its movement. I

10. In a door operating device, the combination with a fluid pressure,operated motor, a valve for controlling the supply and exhaust of fluidpressure to and from said motor, of an electric circuit for controllingthe operation of said valve, and means operated by the manual movementof said motor for closing said circuit and fluid pressure actuated meansfor maintaining said circuit closed until the end of the movement ofsaid motor, and fluid pressure actuated means for breaking said circuitwhen said motor has completed its movement.

11. The combination with a double piston motor, of an electric valve forcontrolling the supply of fluid pressure thereto, a eir cuit forcontrolling said valve, terminals arranged in said circuit, fluidpressure actuated means for connecting said terminals,

.said means and said motor receiving said fluid pressure coincidentlyand from a common source.

12. The combination with a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and fromsaidmotor, electric devices to control said yalve, normally opencircuits for controlling said electric devices, of means for momentarilyclosing one of said circuits, and fluid pressure means operated therebyfor maintaining said circuit closed, and means for momentarily closingthe other of said circuits and means operated thereby for opening saidfirst mentioned circuit.

13. The combination with a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and from saidmotor, electric devices to control said valve, normally open circuitsfor controlling said electric devices, of means for momentarily closingone of said circuits, and means operated thereby for maintaining saidcircuit closed, and means for momentarily closing the other of saidcircuits, and fluid pressure means operated thereby for opening saidfirst mentioned circuit.

14. The combination with a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and from saidmotor, electric devices to control said valve, normally open circuitsfor controlhng sa1d electric devices, of means for momentarily closingone of said circuits,

and means operated thereby for maintaining said circuit closed, andmeans for momentarily closing the other of said circuits to operate saidlast mentioned means to open said first mentioned circuit, and tomaintain said first mentioned circuit open.

15. The combination With a fluid pressure operated motor, a valve forcontrolling the supply and exhaust of fluid pressure to and from saidmotor, electric devices to control said valve, normally open circuitsfor controlling said electric devices, of means for momentarily closingone of said circuits, and means operated thereby for maintaining saidcircuit closed, and means for momentarily closing the other of saidcircuits to operate said last mentioned means to open said firstmentioned circuit, and to maintain said second circuit closed.

In testimony whereof I have hereunto set my hand on this 25th day ofAugust A. D.,

ALBERT GOTTSCHALK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C,

